Accumulator



FIG. 1 is a right front perspective view of an accumulator showing my new design;

FIG. 2 is a top left rear perspective view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is an enlarged fragmented top right rear perspective view thereof, wherein the covers are shown removed for ease of illustration; and,

FIG. 6 is a bottom front left perspective view thereof, wherein the covers are shown removed for ease of illustration. 

CLAIM The ornamental design for an accumulator, as shown and described. 